Rotork Controls [India] PVT Ltd offers Quarter-Turn Fluid Valve Operator. Rotork Controls [India] PVT Ltd supplies a wide range of power automation products like electric actuator, fluid actuator, process control actuators, gear boxes and accessories. The Quarter-Turn Fluid Valve Operator is designed to operate either as a manual hand-wheel or hydraulically via an external hydraulic power unit connected to the quick-connect fittings.